Predictive relationships among perceived family processes, intrinsic and extrinsic motivation, incremental beliefs about intelligence, confidence in intelligence, and creative problem-solving practices in mathematics and science were examined. Participants were 733 scientifically talented Korean students in fourth through twelfth grades as well as 71 individuals in fifth grade, tenth grade, and former Korean Science Olympians. Across all students, perceived positive family processes directly predicted creative problem-solving practices in mathematics and science and were indirectly predicted through enhancing confidence in intelligence and intrinsic motivation, which, in turn, predicted students' creative problem solving in mathematics and science. Confidence in intelligence was the best predictor of creative problem solving for scientifically talented fifth- and tenth-grade students but not for Olympians. Alternative interpretations, the importance of confidence in intelligence for creative problem solving in mathematics and science, and educational implications are discussed. (Contains 4 tables and 2 figures.)